Add a policy for disabling the stripping of PAC URLs.

chrome/browser/io_thread.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 220 matching lines @@
 
   // Returns the callback for updating data use prefs.
   const metrics::UpdateUsagePrefCallbackType& GetMetricsDataUseForwarder();
 
   // Registers the |observer| for new STH notifications.
   void RegisterSTHObserver(net::ct::STHObserver* observer);
 
   // Un-registers the |observer|.
   void UnregisterSTHObserver(net::ct::STHObserver* observer);
 
+  // Returns true if the indicated proxy resolution features are enabled.

[mmenke, 2016/06/03 15:59:22]

Do we document these features anywhere in the source?  We don't in the prefs
file, we don't here, and we don't in ProxyServiceFactory::CreateProxyService. 
Think they should be documented somewhere, and have a pointer to that
documentation here.

[eroman, 2016/06/03 16:49:03]

Done.

+  bool WpadQuickCheckEnabled() const;
+  bool PacHttpsUrlStrippingEnabled() const;
+
  private:
   // Provide SystemURLRequestContextGetter with access to
   // InitSystemRequestContext().
   friend class SystemURLRequestContextGetter;
 
   friend class test::IOThreadPeer;
 
   // BrowserThreadDelegate implementation, runs on the IO thread.
   // This handles initialization and destruction of state that must
   // live on the IO thread.
@@ skipping 70 matching lines @@
   std::unique_ptr<net::LoggingNetworkChangeObserver> network_change_observer_;
 
   std::unique_ptr<certificate_transparency::TreeStateTracker> ct_tree_tracker_;
 
   BooleanPrefMember system_enable_referrers_;
 
   BooleanPrefMember dns_client_enabled_;
 
   BooleanPrefMember quick_check_enabled_;
 
+  BooleanPrefMember pac_https_url_stripping_enabled_;
+
   // Store HTTP Auth-related policies in this thread.
   // TODO(aberent) Make the list of auth schemes a PrefMember, so that the
   // policy can change after startup (https://crbug/549273).
   std::string auth_schemes_;
   BooleanPrefMember negotiate_disable_cname_lookup_;
   BooleanPrefMember negotiate_enable_port_;
   StringPrefMember auth_server_whitelist_;
   StringPrefMember auth_delegate_whitelist_;
 
 #if defined(OS_ANDROID)
@@ skipping 31 matching lines @@
   // Callback for updating data use prefs which needs to be initialized on UI
   // thread and passed to |ChromeNetworkDelegate|.
   metrics::UpdateUsagePrefCallbackType metrics_data_use_forwarder_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_